Nut-lock.



J. P. REMINGTON.

NUT LOCK.

APPLICATION FILED MAR. 21, 1914.

1,161,0U. Patented Nov. 16, 1915.

Imwwtor cow/mam P ANUGRAPH CO.,WASHINGTDN. b. c.

; A orrrc.

JOSEPH PERCY nE vIINe'roN, OEPIIILADELPHIA, EENNSYLVANIA, ASSIGNOR 0E ONE- LE TO CHARLES DAY AND JOHN E. ZIMMERMAN, EoTIIoE PHILADELPHIA, PENNSYLVANIA, DOING BUSINESS UNDER THE FIRM-NAME oEnAY & zIMMEmvIAN,

OF PHILADELPHIA, PENNSYLVANIA;

NUT-LOCK.

Specification of LettersPatent.

Patented Nov. 16, 1915..

Application filedMarch 21, 1914. a Serial No. 826,211.

Philadelphia and State of. Pennsylvania,

have invented certain new and useful Improvements in Nut-Locks, whereof the following is a specification, reference being had to the accompanying drawings.

My invention relates to a dished nut lock having a maximum locking power and high resistance to flattening strains, constructed with great simplicity and with a minimum expenditure of metal.

It consists of a dished annulus, concave on its lower side, its interior periphery fitted with opposed locking segments, with capacity to enter the thread of the bolt, and with those portions of the annulus which correspond to the spaces between such segments turned up at right angles, whereby they perform the function of trusses to resist flattening strains. The flat sides of the turned up portions are also useful as affording means for applying a wrench to the nut look by which it is brought home to its seat.

In the accompanying drawings, Figure I, is a side elevation of a bolt and nut having my nut lock applied thereto. Fig. II, is a similar view at right angles to the above. Fig. III, is a Similar view with the nut and nut lock insection. Fig. IV, is a plan VlBW;

of the nut and nut lock. Fig. V, is a perspective View of the nut look by itself, and Fig. VI, is a plan View of the metal annulus from which the nut lock is made.

My nut lock is out or punched from rolled steel sheet metal from one thirty-second to one-eighth of an inch in thickness, according to the size of the nut lock. To produce my nut look there, is out from such metal an annulus 1, shaped somewhat as shown in Fig. VI, where it will be observed that the exterior periphery 2, of the annulus is a continuous circle, while the interior periphery is of irregular shape comprising opposed circular biting segments 3, 3, and also opposed flattened portions 4, 4. Roughly speaking this internal periphery 1s spool shaped, the flattened segments corresponding to the top and bottom of the spool and the biting segment corresponding to the sides of the spool.

I prefer to cut the internalperiphery of the annulus by a punch, shearing from above only, the circular segments being cut at an angle of about thirty degrees to the vertical, thereby producing an edge for the biting segments having an acute angle of about sixty degrees in cross section, as visible in Figs. III, and V, such an acute angular edge more readily entering the thread 011; the bolt, than one out with a ninety degree s ear.

In the drawings, I have shown the opposed biting segments of continuous curvature, but I may increase the locking capacity of these segments, by cutting them so as to produce serrations along these edges.

The annulus thus formed is dished as best shown in Figs. III, and V, making the lower side of the nut lock concave and the upper side convex.

The sides of the annulus corresponding to the flattened segments 4, 4, are turned up to form parallel trusses l0, 10. The line along which this upturning occurs is so chosen as to bring the flattened edges 4, 4, into position as part of the lower edge of each of the trusses. In this way each of the trusses 10, 10, has a curved upper edge 11, and a lower edge 12, flat in part. The trusses are turned up at right angles to the plane of the nut lock proper, and perform the double function (1) of afl'ording strong resistance members opposing any strain which may tend to flatten the concave nut lock, and (2) of affording flat surfaces for application of the wrench. In a dished nut lock the bite is secured by the resistance of the nut to flattening when an attempt is made to screw it down flat upon the nut against which it is to lie, and the more strong the resistance of the nut lock to this flattening action, the more firmly can the.

0nd function of these turned up portions is to afl'ord a flattenedsurface to which may be applied the wrench by which the lock nut is turned to proper position of tension n faces being turned up to increase the resistagainst the nut which is to be locked.

Having thus described my invention, I

claim 7 1. A nut lock concave on its under side, having means for engaging a bolt and op posed sides turned up at right angles, bent on lines that cross the concavity so as to form'resisting members to the flattening strain and to provide surfaces to which a wrench may be applied.

2. A dished nut lock, having an opening therethrough, which is cut'to provide 01)' posed curved biting segments and opposed straight segments, the sides of the nut lock corresponding to the opposed straight surance of the dished nut lock to flattening strain;

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this nineteenth day of March, 1914.

JOSEPH PERCY REMINGTON.

Witnesses: 1

JAMES H. BELL, E. L. FULLERTON. 7

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

